Knockoff motion for drawing machines



. Sgpt. 4, 1945. E. M. DUNN ETAL 2,384,417 KNOCK-OFF MOTION FOR DRAWING MACHINES Filed May 27, 1942 2 Sheets-Sheet 1 fafiauaom E. M. DUNN HAL 2,384,417

KNOCK-OFF MOTION FOR DRAWING MACHINES Filed May 27, 1942 2 Sheets-Sheet 2 unit z/ claflauaam Patented Sept. 4, 1945 UNITED STATES PATENT oFFicE Ervin M. Dunn and John C. Baucom,

Concord, N. C.

Application May 27, 1942, Serial No. 444,714

2 Claims.

This invention relates to a knock-off motion for drawing machines as used in connection with the spinning of cotton or other fibers.

It is particularly aimed to provide an exceedingly simple construction capable of serving as an attachment for existing machines, one which is adapted for adjustable mounting on the table or frame of the drawing machine and one which employs an adjustable stop or ratchet on the rocker means which controls operation. The

rolls caused by lumps catching in trumpets, by stopping the machine. The machine will also be stopped by any extraneous matter which passes between the upper and lower rolls. Use of vention will step up production, will prolong the life of cork or leather that is used on some rolls and will reduce injury on steel or metallic rollers.

The more specific bjects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings:

Figure l is a fragmentary view in end elevation for the most part, the drawing machine table being shown in section;

Figure 2 is a vertical section through the parts of Figure 1 taken at a right angle thereto;

Figure 3 is a vertical sectional view detailing the stop or ratchet device employed on the rocker means;

Figure 4 is a detail plan view of the stop or ratchet element alone;

Figure is a substantially central vertical sectional view through the pivotal mounting for the knock-off lever;

Figure 6 is a plan view of said knock-off lever and mounting, and

Figure '7 is a detail perspective view, partly broken away, of one of the control bars empl0Yed.

Referring specifically to the drawings wherein like reference characters designate like or similar parts, suflicient elements of a drawing frame such as is employed in connection with the spinning of cotton or other fibers. is shown ally at ID, to enable our invention to be illustrated and understood. Our invention is shown as an attachment for the machine although it may be built into the same initially if desired.

Of the said drawing machine H represents a series of upper' rolls coacting with a series of lower rolls l2 between which the cotton or other fibers pass as is conventional. The rollers I lare the ingener invention prevents waste of cotton and calender shaft of the drawing frame.

relatively loos'e so that they may'move vertically away from the rolls I2 independently of each other. The table of the drawing machine is fragmentarily suggested at l3, and means for operating the rollers as is conventional in the art, is under control of rocker means which may be in the form of a, shipper lever l4 carrying a shaft, which rocks with the lever, at l5. Elements l5 continuously oscillates when the drawing frame is running and this element is known as the rocker In practice, the rolls I l are sometimes entirely of steel, sometimes are provided with externalsurfaces ofleather, cork or other material. Cur invention is capable of use regardless of the material from which the rollers are made, particularly therollers II, and it coacts with the rollers regardless of the material used in their manufacture.

In carrying out the invention; we provide a knock-off mechanism including one or more knock-01f levers at l6, preferably two being employed as illustrated best in Figure 1 and the same being arranged on opposite sides of the path traversed by the cotton or fibers coacting with the rollers II, and I2. Said levers l6 are pivoted by means of horizontal bolts at I! to heads ill of screw shanks l9 integral therewith. Such screw shanks [9 pass through openings 20 in the table I3 and such shanks are rigidly fastened at any desired elevation by nuts 2|, threaded thereto and coacting with opposite sides of table 13, preferably with washers 22 interposed. Such construction enables the height of the knock-01f levers Hi to be varied, or adjusted.

Levers l6 have hooks 23 at one end, adapted for interlocking engagement with the upper end of a stop element 24 which may be of metal and have its upper end curved outwardly as at 25. The stop element 24 is also preferably vertically adjustable for coaction with the hook 23. Elemerit 24 is carried by a sectional clamp 26. Clamp 26 may be made in two parts or blocks 21 which are rigidly secured removably to the shaft I5. Such blocks are held in place by bolt or screw members 28 and the latter pass through enlarged slots 29 of the stop element 24, to secure the atter in place adjustably as described. A set crew 30 may also pass through one of the blocks 2! for binding engagement against the shaft 15.

Knock-01f levers l6, if unrestrained, will move wnwardly at their hook ends 23 and engage the stops 24 at the portions 25, thus arresting motion of the shipper lever M or other control means. However. during normal operation of the drawing frame, the knock-off levers do not interfere with the operation of the shipper lever or rocker means since we provide control bars or members 3| which rest across the top of the rolls I I, bein transverse with respect to their axes, and being held in place by dependents 3'2 thereon, passing between certain of the rolls as shown and engaging the levers l6 at the ends oppositeto the hooks 23, the weight of the-control members being such as to normally sufficiently depress the levers I6 at their adjacent ends, as to maintain the hooks,

23 out of engagement with the stops 24. How

(movement of one of the rolls, means pivotally I mounting the knock-oil lever comprising a pivot ever, if for any reason any of the rolls I should, rise, at either or both ends, it will raise or tilt one or both of the bars 3| and dependent 32.there of,

thus freeing the adjacent end of the lever l6=for enabling movement thereof to such an extenttha't 1e weight of the levers between the axes Hand 5 hooks 23 will lower them into engagement with.

the stop members 24, thus throwing the rolls out of operation to stop or knock-oil the power there- I g It will be understood that the knock-01f herein described will stoprthe'machine as soon as any extraneous matter passes between the'upper and lower rolls H and I2, whichwill sufliciently raise one of the rolls- H; The construction will step up production caused by machine failure to stop when lapping up, will save waste cotton or other fibers and calender rolls caused by lumps catching in trumpets and not letting the machine knock-oil; .will eliminate accidents caused by wrapping up, willsave'cork, leather or the like hen one end of a'roll' wraps up and the other and comes in contact withjthe steel; roll causing it to cut oil the cork orrleather on the latter, will save and prevent many-broken steel rollers and will ste up the life of cork, --leather or equivalent rollers. t

We claim as our invention:

1. In a knock-off motion for drawing rolls, an oscillating element, means controlling the power to operate said rolls, a knock-off lever, means on the said oscillating element engageable by the lever to prevent operation of the said oscillating element when the lever is unrestrained to stop operation ofthe rolls, and c'oiitrol rneans normally maintaining the knock-off lever disengaged vfrom the second-mentioned means consisting of a control member subject to displacement by element, ascrew member having a head mount 15 ingthe'pivot element, said screw member engaging' the frame of the machine, and fastening means meeting with the screw member on opposite sides of that part of the frame mounting the screw member.

2. In at knock-01f motion for drawing rolls, an" oscillating shaft,,means controlling thepower to operate said rolls, a knock-oil lever," a stop element engageable by the lever to prevent operat'ion of the said oscillating shaft when the lever is unrestrained to stop operationof the rolls, a sectional clamp, fastening meanssecuring the clamp to the shaft, said. stop element having enlarged openings, the fastening means passing through said openings and. securing the stop member to the clamp, and said knock-oil. lever having a hook engageable with thestop element, control means normallypreventing engagement of said hook with said stopl element consisting of a control member subject to displacement by vertical movement of the rolls. l

' ERVIN M. DUNN.

JOHN C. BAUCOM. 

